Shock absorber for vehicles



April 21, 1925. 1,534,424

H. w. STARK ET AL 4 SHOCKABSORBER FOR VEHICLES FilEdDbQ s, 1921 WITNESSINVENTORJ rfl/Jrw 4N0 70 flzzs:

1%; ATTORNEYS a i UNITED sra Patented Apr. 21, 1925.

fires PATENT OFFICE.

awe w. seine me seems n ea cttrnn'rnvo, cameos-ma.

neer; assesses area Winches.

Application area December 5, i921. Serial no. erases.

T'o oll rv/tom it may c'onccrvt Be .It known th-atwe, HUGO W. S ren];

and 'lllrroatne l). REESE, =citizens of the United States, and residentsof Cupertino, county of Santa Clara, State "of "California, haveinvented a certain new and useful Shock Absorber for Vehicles, of whichthe following is a specification;

This invention relates to means lin terfposed between the chassis frameand axle sun ported springs for absorbing shocks incident to the, ope'at'ron orf ra vdhrcle over n roadway.

It i: one off the objects of "the present inveri ion to provide 5701i e'xrenierly shrnpl'c, substantial, practical and inieitpensivei pe ofshock absorbing device that naay be r ily incorporated in any chassisorganiine tions :ztn'd -niay be readily. ihst: Ti ed in worn- 1')'leted*chassi-s] iv ithout necessibait-i11 :any changes in e details ofconstrue ion or alterations the parts. H

Another ebiject of the 'iiiventi'on is to provide a shock absorbingdevice which is adapted to be connected to a'respecti ve end of the axlesupp'orte d spa-ingest We be articulately Connected to a pai t of tliechassis frame or part attached thereto.

A further object is to iprovide a shock absorbing device-consisting of asubstantially rigid box-like lever dapted to be pivoted intermediate 1tsends upon an axle supported spring and which lever is pro-* vided with acushioning spring. Which allows the yielding action of the lever uponthe downward thrust of the attached (illitSSiS part andpositivcly limitsthe swinging of a the lever in one direction from one of its ment of therear end of a chassis and spring of a vehicle, showing the device, asapplied.

. the device.

1* ig. 2 is a side elevation showingfithe con nection of the device tothe chassis fnarn' anclto the rear end of a frontspnimg,

3 is a side elevation of the device, as applied to a type of rear endhaving a spring arm attached to the chassis fname and to which thedevice is connebted'.

Fig. 4 is a section on a somewhat' larger scale. in a vertical plane,longitudinally of Fig. 5 is'aperspective"of'the detached anti dismantledrlever. i

The device of the present invention preferably en'i'bodied in #asubstantial, leverlihe element which is of such construction that it maybe readily introduced between the rear arm or lionn 2 of a vehiclechassis frame and the rear end of a leaf spring 3 supported on an anleri'n any :suitable ana'nner and the same type of lever is also.

equally readily applied to an intermediate portion "of the chassis frame2?, as in 55, and may also he. eaippl ied to quart'e'r zen-r m rear endspring :2 attached to "the chassis frame, as shown llIl Fig. 3;,entbodiedin amlevice subjectedito practical -use", theilever comprisesat one end, "a :tubular bearing 5 through which may be passed a pivot pmor boilt 6. Tlieilever is :provided contiguous to the boss =5 withspaced Zfiulcnuni bearings 53, which are formed in side plates 5 spaceda suitable distance according to the width of the spring 3 to which thelever is adapted to be connected, so that the side plates overlap thesides of the leaves of the spring. The upper corners of the side platesare provided with upstanding lugs or cars through which may be passed afastening pin or bolta'i, which preferably is surrounded with a spacingsleeve 8, and around this is a cushioning sleeve, such as a piece ofrubber hose, shown at 9. The lower corners of the side plates of thelever are extended downwardly a suitable distance, as at 5 and aretransversely connected by a seat forming portion 5 through which passesa limiting pin 10 extending perpendicularly between the side plates ofthe lever and'about which pinis compressed a cushion spring 11, engaginga washer 12 below the head of the stop pin 10, through the lower end ofwhich may be passed a cotterpin 13 to limit its upward movement.

The lever device with its attached spring 11 is, when completelyassembled, readily connected to the chassis and vehicle spring 3 by thepassage of a main pivot pin or bolt 14 through the side bearings 5 ofthe plates and through the eye 3 of the axle supported spring 3. Thefastening pin or bolt 6 is then connected to the rear end of the chassispart 2, 2 or 2, through the me dium of a pair of spaced and preferablyarcuate shackle links 15, whose upper ends are connected by a pin orbolt 16 to the chassis frame or associated part. To limit the downwardswinging movement of the end of the lever which overlaps the sides ofthe spring 3, the bolt 7 is passed through the ears 5 and the cushioningsleeve or rubber bumper 9 is then disposed across the top leaf of thespring 3, so that if the end of the lever connected to the bolt 6 tendsto swing up, then the stop bumper 9 will bear down upon the top of thespring and limit the movement of the lever.

In operation of the device, when such an obstacle is encountered in theroadway as to tend to suddenly thrust the axle supported springupwardly, the resistance of the frame 2 and the parts thereof attachedto the lever at the boss 5, tends to swing the end of the lever which iscontiguous to the spring 3, upwardly and this action is yieldinglyresisted by the cushioning means, such as the spring 11, hearing thehead of the stop pin 10 up against thelower surface of the contiguousleaf of the spring 8. As the spring 11 reaches a certain state ofcompression, the downward thrust of the frame 2 is then subjected to andcarried by the main spring 3. As soon as the forces are again restoredto normal, the spring 11 expands and restores the lever to a positionwith the stop device 9, carried on the cross pin 7, down to limitingengagement with the top of the spring 3.

In Figure 2 the same shock absorbing device is shown as connected by theshackle links 15 to a bearing part 16 at the intermediate portion of theframe 2; the lever bearings 5 being connected to the rear end of a frontspring 3 In Fig. 3, the device is shown as combined with a type ofchassis construction in which there is a rearwardly extending spring arm2" attached to the chassis frame. This arm is shown as curving under therear end of the lever device and is connected to it by the invertedshackle links 15.

From the above it will be seen that we have provided an extremely simpleand compact form of cushioning device consisting essentially of asubstantial lever member which carries a cushioning device in the formof the spring 11, having a constant reaction against the contiguous endof a connected axle carried spring.

What is claimed is:

The combination with an axle supported leaf spring of a vehicle, of alever pivoted intermediate its ends to the end of the spring, shacklesconnecting one end of the lever with the vehicle frame, said lever having side plates lying on opposite sides of the leaf spring, a seatconnecting the side plates together below the spring, a pin extendingthrough said seat into engagement with said spring and a coiled springsurrounding said pin and pressing it against said leaf spring.

In testimony whereof, we have hereunto set our hands.

HUGO W. STARK. THOMAS D. REESE.

